Hi, I also have the same issue, so I contacted the TP-LINK support, they told me that some webistes or APPs are not recognised by Trend Micro, so it shows null, but they will fix it in the next...

A few power outages will restart the bulb or reset it. If there is no power outage, did you set schedule or enable away mode?

Guys, contact tplink support, email them, call them, if you've updated firmware, factory reset the bulb.

Update firmware, factory reset, contact tplink support if problem still exists.

Can you post the setup details from the VPN provider here?

You don't see FTP as an option any more? What's the firmware version of your cam? Which version of tpcamera app you are using?